Search results: Physical+sciences+%3e+Materials

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Functionalized silicon nanocrystals
BackgroundSilicon (Si) is an extraordinarily useful semiconductor, employed in integrated circuits, solar cells, and photodetectors; however, it exhibits no significant luminescence at room temperature because of its indirect band gap. Silicon nanocrystals (SiNCs), or quantum dots, on the other hand can be efficient light emitters, with emission wavelength...
Published: 12/14/2020   |   Inventor(s): Brian Korgel, Yixuan Yu, Paola Ceroni, Giacomo Bergamini, Mirko Locritani
Keywords(s): Quantum dots, Silicon nanocrystals
Category(s): Physical sciences > Materials
Visible to near-infrared light activated photopolymer resins
BackgroundResin 3D printing has many advantages, such as high precision, smooth surface finish, and rapid printing speed. Conventional LCD or DLP devices use ultraviolet (UV) light to activate photo-initiators in the resin. A cheaper, less power hungry, and more biocompatible alternative would be to use visible light to activate photo-sensitizers in...
Published: 12/12/2020   |   Inventor(s): Zachariah Page
Keywords(s): 3D printing, Additive manufacturing, Resin
Category(s): Physical sciences > Additive manufacturing, Physical sciences > Materials
Low-cost photothermal composites for solar-assisted desalinization and oil-spill cleanup
Problem Current methods for water decontamination and desalination of ocean water to provide clean drinking water are time consuming and expensive. The materials that have previously been reported for these functions are difficult and expensive to synthesize. Additionally, these materials usually have drastic limitations such as being mechanically fragile,...
Published: 12/9/2020   |   Inventor(s): Donglei Fan, Weigu Li
Keywords(s): Decontamination, Desalinization, Water collection, Water purification
Category(s): Physical sciences > Green tech, Physical sciences > Materials
Silver carriers stabilized by ionic liquids under presence of hydrogen gas
Problem statement Silver ions in facilitated transport membranes are often unstable under desirable operating conditions for facilitated transport of olefins. Upon exposure to hydrogen gas, the silver ions irreversibly reduce to elemental silver and become immobilized within the membrane, limiting the ability of these membranes to be effective for long-term...
Published: 12/9/2020   |   Inventor(s): Joan Brennecke, Benny Freeman, Constanza Sanchez
Keywords(s): Chemical production, Chemicals
Category(s): Physical sciences > Materials
Superior resistance UV darkening prevention in electrochromic smart windows
A better-performing, longer-lasting “smart window” materialProblem statementA large portion of the world’s energy expenditure is devoted to the heating, cooling, and lighting of buildings. Electrochromic materials are widely used to control the amount of light and heat allowed to pass through windows (i.e., “smart windows”)....
Published: 12/9/2020   |   Inventor(s): Delia Milliron, Jongwook Kim
Keywords(s): Clean tech, Materials
Category(s): Physical sciences > Materials
High-capacity, surface-modified layered oxide cathodes with low irreversible capacity loss for lithium-ion batteries
BackgroundLithium-ion batteries have become the chemistry of choice for portable electronic devices such as laptops and cell phones because they offer much higher energy density compared to other rechargeable systems. However, lithium-ion batteries currently use layered lithium cobalt oxide as the cathode (positive electrode) material, only use 50%...
Published: 12/9/2020   |   Inventor(s): Arumugam Manthiram, Yan Wu
Keywords(s): Batteries, Energy storage, Li-ion, Lithium-ion
Category(s): Physical sciences > Energy > Batteries/energy storage, Physical sciences > Materials